Improved glass-furnace



S. OAKMAN. GLASS FURNACE.

O- 33,066' Patented Mar. 23, 1869 WITNESSES:

- furnace.

snow game SAMUEL OAKMAN, or no STON, MASSACHUSETTS.

Letters Pdtent No. 88,066, dated March 23, 1869.

numzovsb GLASS-PURNACR Elie-Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, SAMUEL OAKMAN, of Boston, in the county of Suffolk, and'State of Massachusetts, have invented certain new and useful Improvements in Glass-Furnaces; and I do hereby declare that the following is a full and exact description thereof, reference being bad to the accompanyingdrawings, and to the letters of reference marked thereon.

The nature of my invention consists in combining, with'a glass-furnace, a vacnnm-chamber, in which .the exhaust is produced by mechanical means, said chamber being connected to the furnace by suitable fines,- so that a proper draught may be maintained. This vacuum-chamber has inlets over the ports of the furnace, so that the flame and heated, products of combustion comingfrom the ports may be drawn into the vacuum-chamber, and thus away from the workmen.

The object of the invention is'to secure a more perfect draught and ventilation, also saving the expense of large chimneys.

To enable others skilled in theart to make and use my invention, I will proceed tfddescribe its construction andnse.

' jln the drawingsv Figure 1 is a perspective view of the furnace. Figure 2 is a longitudinal vertical section th the centre.

Figure 3 is a longitudinal vertical section passing throughthe two side chimneys H.

Figure 4 is a cross-vertical section of a part My furnace is constructed of brick, or any suitable material, and provided with two fire-boxes, B and B, one at each end, and a channel, B", connecting the two, through which the flame passes into the chamber S, in which the melting-potsare placed.

For convenience in placing the pots, andalso to obtain the best results fronr the fire, benches, one of which is shown at T, fig. 4, are made at each side of the fire-channel B, running the whole length of the rough On the level with thesebenches, or sieges, large openings or foot-holes, O G O, are made, for convenience in mending the pots and sieges.

D l) 1) aresmall working-holes immediately over the foot-holes, through which the glass is drawn for use.

Each one of the small openings, or working-holes, D D D, is provided with a. cover, I, fig. 1, and also with an outside slide, N, one of which is shown in figs. l and 4.

Immediately above each of the openings, or working-holes,'D D D, an orifice is made leading into the vacuum-chamber, one of which, R, is shown in fig. 4, so that when desirable, the slide N may be closed, as shown in fig.'4, and a communication be made with the fire-chamber T and the vacuum-chamber V.

Each of the openings B, into the vacuum-chamber, is provided with sliding doors, so they may be closed, if desirable.

At eachcorner of the furnace, a flue, h H h, is constructed, which serves to lead the products of combustion from the chamber S to the vacuum-chamber V.-

(See fig. 3.)

K, figs. 1, 3, and 4, is-an exhaust-fitn which is con nected with the vacuum-chamber, by the pipe 70, and which serves to drawthe gases from the vacuum-chamber, and discharge them through the pipes L and M. g These gases may be discharged directly out of doors, or, if they are to any degree combustible, they may be sent, wholly or in part, back into the fire through the pipe. L M; the pipes L L, M M being provided with suitable dampers, so that ,the gases flowing through them may be directed back to the fire, or out of doors.

While the glass is being heated, the working-holes I) D D are closed, so that, no air is admitted to the furnace, except that which comes from the blast, but when the glass is being worked, the slides N are raised, the working-holes are opened, and the orifices R, opening into the vacuum-chambenare also open, so that there will be a strong draught, or current of air passing immediately infront and over the Working-holes into tlievacuum-chamber.

This draught will carry all the flame and smoke that escapes from the working-holes up into the vacuumchamber, and also furnish fresh air. for the workmen, thuscnabling them to work with much more case and comfort.

In the drawings, I have represented a commonfanblower as the exhanstdevice, but I do not wish to confine myself to this alone, as there are other well-known machines for exhausting air, which would work equally well in combination with my vacuum-chamber.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is-- v I Combining, with a glass-furnace, a vacuum-chamber, V, arranged with openings and flues, substantially as described, when the same is provided with mechanical exhaust-device, working substantially as described and for the purpose set forth.

SAMUEL OAKMAN. Witnesses:

.FRANK G. PARKER,

A. HUN BERRY. 

